News Details
TMXDI coating crosslinking agent
2017-4-16 17:46:48
TMXDI coating crosslinking agent,Two new isocyanate - between the base and on - tetramethyl benzene 2 methylene diisocyanate (and of TMXDI) used in fabrication of important raw materials of powder coating curing agent is very potential. Compared with traditional aliphatic isocyanate, they have the advantage of more economical and practical.
Single isocyanate is one of the important intermediates in organic synthesis, can be made into a series of carbamate insecticides, fungicides, herbicides, and also to improve waterproof plastic, fabric, leather, etc. More than two functional groups and isocyanate can be used in the synthesis of a series of excellent performance of polyurethane foam plastic, rubber, elastic fiber, paint, adhesives, synthetic leather, artificial wood, etc.
Currently, the largest output is the most widely used are: Toluene Diisocyanate (Toluene Diisocyanate, TDI); Diphenyl methane Diisocyanate (Methylenediphenyl Diisocyanate, MDI).
Toluene diisocyanate (TDI) is a colorless, has a strong pungent flavour liquid, the boiling point of 251 ° C, specific gravity 1.22, with light black, has strong stimulation to the skin, eyes, and can cause eczema with bronchial asthma, is mainly used for polyurethane foam plastics, coating, synthetic rubber, insulating paint, adhesives, etc. According to its composition, tdi is a nitrogenous base of organic compounds.
Diphenyl methane diisocyanate (MDI) is divided into pure MDI and crude MDI. Pure MDI under normal temperature for white solid, when heated to stimulate the stink, the boiling point of 196 ° C, it is mainly used for rigid polyurethane foam plastics, synthetic fiber, synthetic rubber, synthetic leather, adhesives, etc. According to its composition, pure diphenyl methane diisocyanate was nitrogenous organic compounds.
And the yellow variant 1, 6 - diisocyanate (HDI).
Preparation: industry mainly adopts primary amine production isocyanate phosgene method, the reaction is as follows: by diamine diisocyanate can be obtained from phosgene method: with the progress of science and technology and the deepening of the synthesis theory, nitro compounds directly with carbon monoxide catalytic synthesis of isocyanate process of high temperature and high pressure is more and more mature.
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
Flash Point°C161.1°C
Because isocyanate structure containing unsaturated bond, so it is highly reactive, easily with some active group of inorganic and organic reactions, polyurethane elastomer.
(1) and the reaction of hydroxyl compounds, such as with polyol, polyether and polyester amide, castor oil containing active hydroxyl compound reaction of ammonia acid methyl ester.
(2) and the reaction of amino compounds: reaction with amine compounds are usually generated instead of urea, if further generate biuret reaction will eventually.
(3) : after reaction with water react with water to generate amine and carbon dioxide, amine react with isocyanate to generate further instead of urea.
(4) and the reaction of carboxylic compounds: with organic chemical compounds such as carboxylic acid, terminal carboxyl polyester reaction, Mr Mixed anhydride, the final decomposition of co2 and generate amide.
(5) and the reaction of carbamate: affections reaction of formic acid ester.
In addition, the isocyanate under appropriate conditions can also occur from the reaction, to form dimers or high molecular weight polymer, as a result, isocyanate general requirements stored in low temperature, under the condition of no light.
The floorboard of the various kinds of ester of isocyanate. One isocyanate R - N = C = O and diisocyanate O = C = N - R - N = C = O.
The liquid is generally unpleasant smell. A isocyanate is easy with ammonia and amine type, easy to the role of alcohol and carbamate (e.g., amino ethyl formate).
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Single isocyanate is one of the important intermediates in organic synthesis, can be made into a series of carbamate insecticides, fungicides, herbicides, and also to improve waterproof plastic, fabric, leather, etc. More than two functional groups and isocyanate can be used in the synthesis of a series of excellent performance of polyurethane foam plastic, rubber, elastic fiber, paint, adhesives, synthetic leather, artificial wood, etc.
Currently, the largest output is the most widely used are: Toluene Diisocyanate (Toluene Diisocyanate, TDI); Diphenyl methane Diisocyanate (Methylenediphenyl Diisocyanate, MDI).
Toluene diisocyanate (TDI) is a colorless, has a strong pungent flavour liquid, the boiling point of 251 ° C, specific gravity 1.22, with light black, has strong stimulation to the skin, eyes, and can cause eczema with bronchial asthma, is mainly used for polyurethane foam plastics, coating, synthetic rubber, insulating paint, adhesives, etc. According to its composition, tdi is a nitrogenous base of organic compounds.
Diphenyl methane diisocyanate (MDI) is divided into pure MDI and crude MDI. Pure MDI under normal temperature for white solid, when heated to stimulate the stink, the boiling point of 196 ° C, it is mainly used for rigid polyurethane foam plastics, synthetic fiber, synthetic rubber, synthetic leather, adhesives, etc. According to its composition, pure diphenyl methane diisocyanate was nitrogenous organic compounds.
And the yellow variant 1, 6 - diisocyanate (HDI).
Preparation: industry mainly adopts primary amine production isocyanate phosgene method, the reaction is as follows: by diamine diisocyanate can be obtained from phosgene method: with the progress of science and technology and the deepening of the synthesis theory, nitro compounds directly with carbon monoxide catalytic synthesis of isocyanate process of high temperature and high pressure is more and more mature.
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
Flash Point°C161.1°C
Because isocyanate structure containing unsaturated bond, so it is highly reactive, easily with some active group of inorganic and organic reactions, polyurethane elastomer.
(1) and the reaction of hydroxyl compounds, such as with polyol, polyether and polyester amide, castor oil containing active hydroxyl compound reaction of ammonia acid methyl ester.
(2) and the reaction of amino compounds: reaction with amine compounds are usually generated instead of urea, if further generate biuret reaction will eventually.
(3) : after reaction with water react with water to generate amine and carbon dioxide, amine react with isocyanate to generate further instead of urea.
(4) and the reaction of carboxylic compounds: with organic chemical compounds such as carboxylic acid, terminal carboxyl polyester reaction, Mr Mixed anhydride, the final decomposition of co2 and generate amide.
(5) and the reaction of carbamate: affections reaction of formic acid ester.
In addition, the isocyanate under appropriate conditions can also occur from the reaction, to form dimers or high molecular weight polymer, as a result, isocyanate general requirements stored in low temperature, under the condition of no light.
The floorboard of the various kinds of ester of isocyanate. One isocyanate R - N = C = O and diisocyanate O = C = N - R - N = C = O.
The liquid is generally unpleasant smell. A isocyanate is easy with ammonia and amine type, easy to the role of alcohol and carbamate (e.g., amino ethyl formate).
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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